Formation of different types nanoporous composite structure by dealloying of Ag and Ni containing Al-Cu-Ti base amorphous precursor alloys

Jae Ik Hyun; Heug Soo Noh; Kyeongho Kong; Won Tae Kim; Do Hyang Kim

doi:10.1016/j.matchar.2021.111093

Formation of different types nanoporous composite structure by dealloying of Ag and Ni containing Al-Cu-Ti base amorphous precursor alloys

Jae Ik Hyun, Heug Soo Noh, Kyeongho Kong, Won Tae Kim, Do Hyang Kim

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

The effect of minor addition of Ag and Ni on the dealloying behavior, nanoporous structure, and electrocatalytic property has been investigated using Al₄₅Cu₄₅Ti₁₀ amorphous precursor alloy. The dealloying kinetics is significantly suppressed due to low diffusion rate and enhanced passivation effect by addition of Ag and Ni. Two different types of nanoporous composite structure are fabricated, nanoporous Cu incorporated with Ag particles and bi-metallic nanoporous Cu-Ni. The resulting multi-component nanoporous composites exhibit improved electrocatalytic property for BH₄⁻ oxidation. This study offers a strategy for fabricating nanoporous composites to replace precious metal electrocatalysis.

Original language	English
Article number	111093
Journal	Materials Characterization
Volume	175
DOIs	https://doi.org/10.1016/j.matchar.2021.111093
Publication status	Published - 2021 May

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the government ( MSIT ) (No. 2020R1A5A1019131 , 2020R1H1A2013655 ).

Publisher Copyright:
© 2021

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.matchar.2021.111093

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title = "Formation of different types nanoporous composite structure by dealloying of Ag and Ni containing Al-Cu-Ti base amorphous precursor alloys",

abstract = "The effect of minor addition of Ag and Ni on the dealloying behavior, nanoporous structure, and electrocatalytic property has been investigated using Al45Cu45Ti10 amorphous precursor alloy. The dealloying kinetics is significantly suppressed due to low diffusion rate and enhanced passivation effect by addition of Ag and Ni. Two different types of nanoporous composite structure are fabricated, nanoporous Cu incorporated with Ag particles and bi-metallic nanoporous Cu-Ni. The resulting multi-component nanoporous composites exhibit improved electrocatalytic property for BH4− oxidation. This study offers a strategy for fabricating nanoporous composites to replace precious metal electrocatalysis.",

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AU - Kim, Won Tae

AU - Kim, Do Hyang

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the government ( MSIT ) (No. 2020R1A5A1019131 , 2020R1H1A2013655 ). Publisher Copyright: © 2021

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AB - The effect of minor addition of Ag and Ni on the dealloying behavior, nanoporous structure, and electrocatalytic property has been investigated using Al45Cu45Ti10 amorphous precursor alloy. The dealloying kinetics is significantly suppressed due to low diffusion rate and enhanced passivation effect by addition of Ag and Ni. Two different types of nanoporous composite structure are fabricated, nanoporous Cu incorporated with Ag particles and bi-metallic nanoporous Cu-Ni. The resulting multi-component nanoporous composites exhibit improved electrocatalytic property for BH4− oxidation. This study offers a strategy for fabricating nanoporous composites to replace precious metal electrocatalysis.

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Formation of different types nanoporous composite structure by dealloying of Ag and Ni containing Al-Cu-Ti base amorphous precursor alloys

Abstract

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